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Copy Mills • M270 ™ Series Additional Application Advice • M270 High-Feed Applying High-Feed Tools The high-feed concept bases its strategy in small depth of cut and high fz values, which results in a higher MRR and productivity with low radial forces. Ap1 max Small Ap1 values and higher feed rate generate lower cutting forces versus traditional milling strategies. Recommended when long overhang is necessary due to lower radial forces. Maximum L/D ratio of 10 x D. Rt L/D ratio % of Ap1 max to reduce % of vc to reduce <4 0% 0% 48 65–75% 20–30% For CAM programming, the tools can be programmed as a toroidal tool type by using the Rt value as the insert radius. tool diameter Ø10 Ø12 Ø13 Ø16 Ø17 Ø20 recommended starting Ap1 (mm) 0,40 0,40 0,40 0,60 0,60 0,75 Rt CAM programming 1,15 1,40 1,40 1,90 1,90 2,30 fz recommended for general purpose 0,45 0,55 0,55 0,60 0,60 0,70 fz recommended for 45 HRC (approx.) 0,40 0,45 0,45 0,55 0,55 0,65 fz recommended for 55 HRC (approx.) 0,30 0,35 0,35 0,45 0,45 0,50 NOTE: Use two effective teeth for feed calculations. For materials above 45 HRC, we recommend adjusting the ae max to 55% of cutting diameter and using no more than 50% of Ap1 max. While centre cutting is possible, we recommend using a ramp angle of 0.5°–1.0° to ensure smooth operation. M130 widia.com General Programming Information for Applying M270 High-Feed